79690878 has 24 divisors (see below), whose sum is σ = 179059608. Its totient is φ = 26563464.

The previous prime is 79690829. The next prime is 79690879. The reversal of 79690878 is 87809697.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79690879) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81501 + ... + 82472.

It is an arithmetic number, because the mean of its divisors is an integer number (7460817).

Almost surely, 2^79690878 is an apocalyptic number.

79690878 is an abundant number, since it is smaller than the sum of its proper divisors (99368730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79690878 is a wasteful number, since it uses less digits than its factorization.

79690878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163990 (or 163978 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The square root of 79690878 is about 8926.9747395184. The cubic root of 79690878 is about 430.3312356745.

The spelling of 79690878 in words is "seventy-nine million, six hundred ninety thousand, eight hundred seventy-eight".